drm/msm/dsi: Replace dsi_get_bpp() with mipi_dsi header function

drm_mipi_dsi.h already provides a conversion function from MIPI_DSI_FMT_
to bpp, named mipi_dsi_pixel_format_to_bpp().

Signed-off-by: Marijn Suijten <marijn.suijten@somainline.org>
Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Patchwork: https://patchwork.freedesktop.org/patch/577065/
Link: https://lore.kernel.org/r/20240204-drm-msm-dsi-remove-open-coded-get-bpp-v1-1-c16212de7e86@somainline.org
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>

drivers/gpu/drm/msm/dsi/dsi_host.c

@@ -183,16 +183,6 @@ struct msm_dsi_host {
 	int irq;
 };
 
-static u32 dsi_get_bpp(const enum mipi_dsi_pixel_format fmt)
-{
-	switch (fmt) {
-	case MIPI_DSI_FMT_RGB565:		return 16;
-	case MIPI_DSI_FMT_RGB666_PACKED:	return 18;
-	case MIPI_DSI_FMT_RGB666:
-	case MIPI_DSI_FMT_RGB888:
-	default:				return 24;
-	}
-}
 
 static inline u32 dsi_read(struct msm_dsi_host *msm_host, u32 reg)
 {
@@ -567,7 +557,7 @@ unsigned long dsi_byte_clk_get_rate(struct mipi_dsi_host *host, bool is_bonded_d
 {
 	struct msm_dsi_host *msm_host = to_msm_dsi_host(host);
 	u8 lanes = msm_host->lanes;
-	u32 bpp = dsi_get_bpp(msm_host->format);
+	u32 bpp = mipi_dsi_pixel_format_to_bpp(msm_host->format);
 	unsigned long pclk_rate = dsi_get_pclk_rate(mode, msm_host->dsc, is_bonded_dsi);
 	unsigned long pclk_bpp;
 
@@ -610,7 +600,7 @@ int dsi_calc_clk_rate_6g(struct msm_dsi_host *msm_host, bool is_bonded_dsi)
 
 int dsi_calc_clk_rate_v2(struct msm_dsi_host *msm_host, bool is_bonded_dsi)
 {
-	u32 bpp = dsi_get_bpp(msm_host->format);
+	u32 bpp = mipi_dsi_pixel_format_to_bpp(msm_host->format);
 	unsigned int esc_mhz, esc_div;
 	unsigned long byte_mhz;
 
@@ -993,7 +983,7 @@ static void dsi_timing_setup(struct msm_dsi_host *msm_host, bool is_bonded_dsi)
 
 		/* image data and 1 byte write_memory_start cmd */
 		if (!msm_host->dsc)
-			wc = hdisplay * dsi_get_bpp(msm_host->format) / 8 + 1;
+			wc = hdisplay * mipi_dsi_pixel_format_to_bpp(msm_host->format) / 8 + 1;
 		else
 			/*
 			 * When DSC is enabled, WC = slice_chunk_size * slice_per_pkt + 1.
@@ -1413,7 +1403,7 @@ static int dsi_cmds2buf_tx(struct msm_dsi_host *msm_host,
 {
 	int len, ret;
 	int bllp_len = msm_host->mode->hdisplay *
-			dsi_get_bpp(msm_host->format) / 8;
+			mipi_dsi_pixel_format_to_bpp(msm_host->format) / 8;
 
 	len = dsi_cmd_dma_add(msm_host, msg);
 	if (len < 0) {