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Merge branch 'mediatek-drm-fixes-2016-11-24' of https://github.com/ckhu-mediatek/linux.git-tags into drm-fixes 

This branch include patches of fixing a typo, accurate dsi frame rate,
and fixing null pointer dereference.

* 'mediatek-drm-fixes-2016-11-24' of https://github.com/ckhu-mediatek/linux.git-tags:
  drm/mediatek: fix null pointer dereference
  drm/mediatek: fixed the calc method of data rate per lane
  drm/mediatek: fix a typo of DISP_OD_CFG to OD_RELAYMODE
This commit is contained in:
Dave Airlie 2016-11-25 14:21:26 +10:00
parent d742000240 5ad45307d9
commit 9704668e4b
3 changed files with 58 additions and 26 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

14
drivers/gpu/drm/mediatek/mtk_disp_ovl.c
View File

@ -251,13 +251,6 @@ static int mtk_disp_ovl_probe(struct platform_device *pdev)
if (irq < 0)
return irq;
ret = devm_request_irq(dev, irq, mtk_disp_ovl_irq_handler,
IRQF_TRIGGER_NONE, dev_name(dev), priv);
if (ret < 0) {
dev_err(dev, "Failed to request irq %d: %d\n", irq, ret);
return ret;
}
comp_id = mtk_ddp_comp_get_id(dev->of_node, MTK_DISP_OVL);
if (comp_id < 0) {
dev_err(dev, "Failed to identify by alias: %d\n", comp_id);
@ -273,6 +266,13 @@ static int mtk_disp_ovl_probe(struct platform_device *pdev)
platform_set_drvdata(pdev, priv);
ret = devm_request_irq(dev, irq, mtk_disp_ovl_irq_handler,
IRQF_TRIGGER_NONE, dev_name(dev), priv);
if (ret < 0) {
dev_err(dev, "Failed to request irq %d: %d\n", irq, ret);
return ret;
}
ret = component_add(dev, &mtk_disp_ovl_component_ops);
if (ret)
dev_err(dev, "Failed to add component: %d\n", ret);

2
drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c
View File

@ -123,7 +123,7 @@ static void mtk_od_config(struct mtk_ddp_comp *comp, unsigned int w,
unsigned int bpc)
{
writel(w << 16 | h, comp->regs + DISP_OD_SIZE);
writel(OD_RELAYMODE, comp->regs + OD_RELAYMODE);
writel(OD_RELAYMODE, comp->regs + DISP_OD_CFG);
mtk_dither_set(comp, bpc, DISP_OD_CFG);
}

68
drivers/gpu/drm/mediatek/mtk_dsi.c
View File

@ -86,7 +86,7 @@
#define DSI_PHY_TIMECON0 0x110
#define LPX (0xff << 0)
#define HS_PRPR (0xff << 8)
#define HS_PREP (0xff << 8)
#define HS_ZERO (0xff << 16)
#define HS_TRAIL (0xff << 24)
@ -102,10 +102,16 @@
#define CLK_TRAIL (0xff << 24)
#define DSI_PHY_TIMECON3 0x11c
#define CLK_HS_PRPR (0xff << 0)
#define CLK_HS_PREP (0xff << 0)
#define CLK_HS_POST (0xff << 8)
#define CLK_HS_EXIT (0xff << 16)
#define T_LPX 5
#define T_HS_PREP 6
#define T_HS_TRAIL 8
#define T_HS_EXIT 7
#define T_HS_ZERO 10
#define NS_TO_CYCLE(n, c) ((n) / (c) + (((n) % (c)) ? 1 : 0))
struct phy;
@ -161,20 +167,18 @@ static void mtk_dsi_mask(struct mtk_dsi *dsi, u32 offset, u32 mask, u32 data)
static void dsi_phy_timconfig(struct mtk_dsi *dsi)
{
u32 timcon0, timcon1, timcon2, timcon3;
unsigned int ui, cycle_time;
unsigned int lpx;
u32 ui, cycle_time;
ui = 1000 / dsi->data_rate + 0x01;
cycle_time = 8000 / dsi->data_rate + 0x01;
lpx = 5;
timcon0 = (8 << 24) | (0xa << 16) | (0x6 << 8) | lpx;
timcon1 = (7 << 24) | (5 * lpx << 16) | ((3 * lpx) / 2) << 8 |
(4 * lpx);
timcon0 = T_LPX | T_HS_PREP << 8 | T_HS_ZERO << 16 | T_HS_TRAIL << 24;
timcon1 = 4 * T_LPX | (3 * T_LPX / 2) << 8 | 5 * T_LPX << 16 |
T_HS_EXIT << 24;
timcon2 = ((NS_TO_CYCLE(0x64, cycle_time) + 0xa) << 24) |
(NS_TO_CYCLE(0x150, cycle_time) << 16);
timcon3 = (2 * lpx) << 16 | NS_TO_CYCLE(80 + 52 * ui, cycle_time) << 8 |
NS_TO_CYCLE(0x40, cycle_time);
timcon3 = NS_TO_CYCLE(0x40, cycle_time) | (2 * T_LPX) << 16 |
NS_TO_CYCLE(80 + 52 * ui, cycle_time) << 8;
writel(timcon0, dsi->regs + DSI_PHY_TIMECON0);
writel(timcon1, dsi->regs + DSI_PHY_TIMECON1);
@ -202,19 +206,47 @@ static int mtk_dsi_poweron(struct mtk_dsi *dsi)
{
struct device *dev = dsi->dev;
int ret;
u64 pixel_clock, total_bits;
u32 htotal, htotal_bits, bit_per_pixel, overhead_cycles, overhead_bits;
if (++dsi->refcount != 1)
return 0;
/**
* data_rate = (pixel_clock / 1000) * pixel_dipth * mipi_ratio;
* pixel_clock unit is Khz, data_rata unit is MHz, so need divide 1000.
* mipi_ratio is mipi clk coefficient for balance the pixel clk in mipi.
* we set mipi_ratio is 1.05.
*/
dsi->data_rate = dsi->vm.pixelclock * 3 * 21 / (1 * 1000 * 10);
switch (dsi->format) {
case MIPI_DSI_FMT_RGB565:
bit_per_pixel = 16;
break;
case MIPI_DSI_FMT_RGB666_PACKED:
bit_per_pixel = 18;
break;
case MIPI_DSI_FMT_RGB666:
case MIPI_DSI_FMT_RGB888:
default:
bit_per_pixel = 24;
break;
}
ret = clk_set_rate(dsi->hs_clk, dsi->data_rate * 1000000);
/**
* vm.pixelclock is in kHz, pixel_clock unit is Hz, so multiply by 1000
* htotal_time = htotal * byte_per_pixel / num_lanes
* overhead_time = lpx + hs_prepare + hs_zero + hs_trail + hs_exit
* mipi_ratio = (htotal_time + overhead_time) / htotal_time
* data_rate = pixel_clock * bit_per_pixel * mipi_ratio / num_lanes;
*/
pixel_clock = dsi->vm.pixelclock * 1000;
htotal = dsi->vm.hactive + dsi->vm.hback_porch + dsi->vm.hfront_porch +
dsi->vm.hsync_len;
htotal_bits = htotal * bit_per_pixel;
overhead_cycles = T_LPX + T_HS_PREP + T_HS_ZERO + T_HS_TRAIL +
T_HS_EXIT;
overhead_bits = overhead_cycles * dsi->lanes * 8;
total_bits = htotal_bits + overhead_bits;
dsi->data_rate = DIV_ROUND_UP_ULL(pixel_clock * total_bits,
htotal * dsi->lanes);
ret = clk_set_rate(dsi->hs_clk, dsi->data_rate);
if (ret < 0) {
dev_err(dev, "Failed to set data rate: %d\n", ret);
goto err_refcount;